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ELENA – Electron Cooler ELENA – Electron Cooler

ELENA – Electron Cooler - PowerPoint Presentation

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ELENA – Electron Cooler - PPT Presentation

Jean Cenede BI Day June 10 th 2016 on behalf of Electron Cooler team 1 Map Presentation Electrons Cooling generalities Electron Cooler at CERN ELENA ECooler ID: 639391

10th 2016 beam day 2016 10th day beam march cooler gun collector electron elena amp concept overview design ring cathode cooling electrons

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Slide1

ELENA – Electron Cooler

Jean Cenede BI Day June 10th 2016

on behalf of Electron Cooler team

1

Map Presentation :

Electrons Cooling generalities

Electron Cooler at CERN

ELENA E-Cooler

E-Gun & Collector

Slide2

What‘s a Electron Cooling

BI Day March 10th 2016

Means

to increase the phase space density of a stored ion beam.

Mono-energetic

cold electron beam is merged with ion beam which is cooled through Coulomb interaction

.Electron beam

is renewed and the velocity spread of the ion beam is reduced in all three planes.

2

Slide3

Concept

overview of a E-cooler

e-Gun

e-Collector

Circulating Beam

Electron

Beam

BI Day March 10th 2016

Circulating

Beam

Cooled

3

Solenoïd

DriftSlide4

BI Day March 10th 2016

Low

velocity

Electrons Source :

The E-GUN final current given by Child’s Law:

I = µ .V3/2A set of Magnetic circuit : Expansion Solenoïd, Drift, Toroids, Squeezes coils …. (Used to transport the electrons Beam)A Electron Anode Recuperator : The COLLECTOR Electron Cooler system is composed of :

4

Slide5

Cooling effects

on Beam viewed by

E-cooling

Acceleration

BI Day March 10th 2016

Beam

Ionization

Profile Monitor

(LEIR Vertical datas acquisitions :

A.Frassier

)

Schottky Monitor

(

Beam

Revolution

Frequences

)

5

Slide6

CERN’s Electron Cooler : AD and LEIR

BI Day March 10th 2016

6 Slide7

Location

Soon in ELENA Ring

4th Section

BI Day March 10th 2016

7 Slide8

Concept overview

of Vacuum ElementsVacuum systemGun & Collector

BI Day March 10th 2016

8

Gun

Collector

Vacuum

ChamberSlide9

Concept

overview

of Magnets Elements

Magnets

Supporting

system

9

ToroidSlide10

Toroid Assembling details

10

3D Printing Simulations

Assembling

Sequences

Slide11

Beam

Specifications : I e- : 1/5mAU e- : -55/-355 V No High Voltage Cage

ELENA E-COOLER Power DiagramBI Day March 10th 2016

Momentum

35 MeV/c13.7

MeV/cPbar-beam energy648

keV100 keVE-beam energy355 eV55 eVI e5 mA2 mABgun1000 GBdrift

100 GToroid bending radius0.25 mCathode radius8 mmE-beam radius25 mmCooling drift length1.0 m

11 Slide12

Gun

& Collector Design

Gun and collector design optimization performed with EGUNBI Day March 10th 2016

12

(I

= µ .V3/2 )Slide13

Gun and Collector

Specifications : (Inspired

by : AD, LEIR E-COOLER & FERMILAB design )Adapted to cathode design, electricals, thermals requirements Differents electrodes

with differents

forms, positions & voltages

Modularity for eventuality modifications

XH-Vacuum : 10-12 mmbHight temperature Back-out : 200 to 300°

BI Day March 10th 2016

13 Slide14

Cathode

Assembly Concept overview

Support Cathode Cathode :(Provider SAES Getters)Pierce Electrode

BI Day March 10th 2016

14 Slide15

Gun

Concept overview(on CDD: AD_NECGA%)

Gun Flange (DN160CF + SHV + Fil. connector )Cathode Assembly Grid ElectrodeAnode Electrode Each Potential is separate by ceramic IsolatorSleeve & Elastique compress ring (total : 135mm height)

BI Day March 10th 2016

15 Slide16

Gun to Collector

Design

Gun and collector design optimization performed with COMSOL Multiphysics (G. TRANQUILLE)

BI Day March 10th 2016

16 Slide17

Collector Concept

overview(on CDD : AD_TER% dimensions Ø 314 x 455mm)

Collector (Anode)Ceramic IsolatorReppeler ElectrodeCeramic IsolatorCollector flange (DN200CF)

BI Day March 10th 2016

17 Slide18

Bake Out Brazing Stress

Simulation modification & validation(ANSYS by EN-MME)

BI Day March 10th 2016

18 Slide19

GUN & COLLECTOR :

Ready

E-COOLING Assembling in the midle of ring ELENA Connecting E-COOLER to ELENA ring Planning ELENA Electrons-COOLER

2015Today

2016

2017

BI Day March 10th 2016

I hope it will live Happily !!!!

19 Slide20

ELENA E-cooler

Gun configuration on a lovely Test

bench for validation.

20 Slide21

Soon

ELENA E-COOLER Gun Beam tests(Test

bench bat 236: Started by R.Sautier)

21 Slide22

Thanking to

Electron

Cooler team :

Gerard Tranquille

Alexandre Frassier

Lars

Soby Lars Varming J. Marc Timmins Antti Juhani K. Alejandro Carlon Z.Benjamin Moles BE BIBE OP

EN MME

22 Slide23

That’s All For Now

BI Day March 10th 2016

Next

step for E-COOL Team :

A new E-COOLER for AD-RING for LS2

23 Slide24
Slide25
Slide26

The magnet system

Magnetic system components

Main cooler solenoidGun solenoidCollector solenoidExpansion solenoidSqueeze coil at collector2 x Toroid section consisting of 9 racetrack coils eachVarious corrector coils to ensure good field qualityOrbit correctorsSolenoid compensatorsSlide27

Fine tuning the fieldSlide28

Beam

Ionisation

Profile Monitors

Bottom Electrode

MCP

Top Electrode

Readout

e-

Ion +

e-

Residual Gas

Vaccum Chamber